from django.shortcuts import render
from rest_framework import filters
from rest_framework.generics import GenericAPIView, ListAPIView
from . import serializers
from .models import SKU
from rest_framework.response import Response
from .serializers import SKUIndexSerializer
from drf_haystack.viewsets import HaystackViewSet


class HotSkuListView(ListAPIView):
    serializer_class = serializers.HotSkuListSerializer

    # 关闭分页
    pagination_class = None

    def get_queryset(self):
        category_id = self.kwargs.get("category_id")
        skus = SKU.objects.filter(category_id=category_id).order_by("-sales")[:2]   # 两条数据
        return skus

    # 二级视图：GenericAPIView
    # def get(self, request, category_id):
    #     # 1.获取对象
    #     queryset = self.get_queryset()
    #
    #     # 2.获取序列化器
    #     serializer = self.get_serializer(instance=queryset, many=True)
    #
    #     # 3.返回数据
    #     return Response(serializer.data)


class SkuListView(ListAPIView):
    serializer_class = serializers.HotSkuListSerializer

    # 设置过滤后端， 排序字段
    filter_backends = (filters.OrderingFilter,)
    ordering_fields = ('create_time', 'price', "sales")

    def get_queryset(self):
        # 1. 获取分类编号
        category_id = self.kwargs.get("category_id")

        # 2.根据分类编号查询数据
        skus = SKU.objects.filter(category_id=category_id)

        # 3. 返回
        return skus


class SKUSearchViewSet(HaystackViewSet):
    """
    SKU搜索
    """
    # 1.数据集
    index_models = [SKU]

    # 2.序列化器
    serializer_class = SKUIndexSerializer
